Knife



FIG. 1 is a top plan view of a knife showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof; and

FIG. 6 is an opposite side elevational view thereof. 

The ornamental design for a knife, as shown. 